/* 页面基本样式 */
body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1, h2 {
    color: #333;
}

a {
    text-decoration: none;
    color: #3498db;
}

a:hover {
    text-decoration: underline;
}

table {
    width: 80%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 18px;
    text-align: left;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 12px;
    text-align: center;
}

th {
    background-color: #4CAF50;
    color: white;
}

tr:nth-child(even) {
    background-color: #f2f2f2;
}

tr:hover {
    background-color: #ddd;
}

/* 按钮样式 */
button, input[type="submit"] {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 16px;
}

button:hover, input[type="submit"]:hover {
    background-color: #45a049;
}

/* 表单样式 */
form {
    margin: 20px 0;
}

label {
    display: block;
    margin: 10px 0;
    font-weight: bold;
}